Magnetic conductance through a single molecule by means of spin-polarized STM

2017 Fiscal Year Final Research Report

• Project Area: Molecular Architectonics: Orchestration of Single Molecules for Novel Function
• Project/Area Number: 25110011
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Chiba University
• Principal Investigator: YAMADA TOYOKAZU 千葉大学, 大学院工学研究院, 准教授 (10383548)
• Co-Investigator(Renkei-kenkyūsha): NAKAMURA Kohji 三重大学, 大学院工学研究科, 准教授 (70281847) ; INAMI Eiichi 千葉大学, 大学院工学研究院, 特任講師 (40420418)
• Project Period (FY): 2013-06-28 – 2018-03-31
• Keywords: スピン偏極走査トンネル顕微鏡 / 単一有機分子 / 原子操作 / グラフェンナノリボン / 表面科学

Outline of Final Research Achievements

Hybridization between π electron orbitals of organic molecules and 3d electronic orbitals of magnetic metals has been investigated by means of scanning tunneling microscopy (STM) and STM spectroscopy. When π-conjugated organic molecules are adsorbed on magnetic substrates with 3d density of states peaks near the Fermi energy, strong π-d hybridization is occurred, which enhances the adsorption energy of the molecule more than the thermal diffusion energy. Thus, even at 300 K we succeeded to observed single π-conjugated organic molecules, such as phthalocyanine. We demonstrated to control electron spin configurations of single 3d magnetic atoms by using local ligand fields inside the single organic molecule combined with STM atom manipulation. We also succeeded to observe drop-casted single-layer graphene nanoribbons (GNR). In spite of the fact that the GNRs were buckled, electron density of states was very uniform, and the crossing area of two GNRs ｓhowed p-type semiconductor.

Free Research Field

表面科学